Multi-stage tubular washing tower

Abstract

The invention discloses a multi-stage tubular washing tower. The multi-stage tubular washing tower comprises a washing tank and a spraying unit, an air inlet is formed in the side wall of the washing tank, the air inlet is located below the spraying unit, and an exhaust port is formed in the top of the washing tank; the spraying unit comprises a plurality of spraying frames, a driving unit, a demisting baffle and a plurality of filtering plates; the spraying frames are sequentially arranged in the washing tank in the flowing direction of gas in the washing tank, each spraying frame is provided with a first spraying head and a second spraying head, the first spraying heads spray an absorbent upwards, and the second spraying heads spray the absorbent downwards; the driving unit is connected with the plurality of spraying frames; the demisting baffle plate is arranged in the washing tank and is positioned above the plurality of spraying frames; and the plurality of filter plates are in one-to-one correspondence with the plurality of spraying frames. The method has the advantages of fully utilizing the absorption liquid and improving the washing quality.

Description

Technical Field

[0001] The invention belongs to the technical field of washing towers, and in particular relates to a multi-stage tubular washing tower. Background Art

[0002] At present, in view of the pollution problem of coal gasification and the increasingly stringent energy conservation and emission reduction requirements of the country, coal gas purification and post-processing equipment with environmental protection performance has become a research hotspot. The scrubber is a new type of gas purification and processing equipment. It is improved on the basis of the floating packing layer gas purifier and is widely used in pre-treatment of industrial waste gas purification and dust removal, with good purification effect. Because its working principle is similar to the washing process, it is called a scrubber.

[0003] The scrubber uses a liquid absorbent (such as water or a solution) to chemically react or physically adsorb pollutants in the gas, thereby removing pollutants from the gas. The absorbent can be alkaline, acidic or neutral, depending on the nature of the pollutants to be removed. The scrubber usually consists of a tower body, a packing layer and a spray system; the spray system is used to spray the absorbent evenly onto the packing layer. The gas enters from the bottom of the tower and contacts the absorbent when passing through the packing layer. The pollutants are absorbed or adsorbed, and the washed gas is discharged from the top of the tower. However, in the existing technology, in order to ensure the compliance rate of the gas after washing, a large amount of absorbent is continuously transported into the packing layer. However, in this process, a large amount of absorbent cannot be fully utilized, resulting in a waste of resources. In order to solve this problem, a multi-stage tubular scrubber is proposed. Summary of the invention

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art.

[0005] To this end, the present invention proposes a multi-stage tubular washing tower, which has the advantages of fully utilizing the absorption liquid and improving the washing quality.

[0006] A multi-stage tubular washing tower according to an embodiment of the present invention comprises: a washing tank and a spray unit; an air inlet is formed on the side wall of the washing tank, the air inlet is located below the spray unit, and an exhaust port is formed on the top of the washing tank;

[0007] The spray unit includes: a plurality of spray racks, a driving unit, a demisting baffle and a plurality of filter plates; the plurality of spray racks are sequentially arranged inside the washing tank along the flow direction of the gas in the washing tank, and a first spray head and a second spray head are arranged on the spray rack, the first spray head sprays absorbent upward, and the second spray head sprays absorbent downward; the driving unit is connected to the plurality of spray racks, and the driving unit is used to drive the spray rack to rotate; the demisting baffle is arranged in the washing tank, and the demisting baffle is located above the plurality of spray racks; the plurality of filter plates correspond to the plurality of spray racks one by one, and the filter plates are located below the corresponding spray racks.

[0008] According to one embodiment of the present invention, the spray unit also includes: a main flow pipe and an infusion pipe, one end of the infusion pipe is rotatably connected to one end of the main flow pipe, the spray frame is fixedly connected to the main flow pipe, and the other end of the main flow pipe is fixedly connected to the output end of the drive unit.

[0009] According to one embodiment of the present invention, the spray rack includes a plurality of brackets, the plurality of brackets are arranged at intervals along the circumferential direction of the main flow pipe, the number of the first spray heads and the second spray heads is multiple, and the plurality of the first spray heads and the second spray heads are evenly distributed on the brackets.

[0010] According to one embodiment of the present invention, the bracket extends along the radial direction of the main flow pipe to the inner wall of the washing tank.

[0011] According to one embodiment of the present invention, scrapers are provided at both upper and lower ends of the filter plate, and the scrapers are fixedly connected to the main flow pipe.

[0012] According to an embodiment of the present invention, a silicone sheet is provided on the scraper blade, and the silicone sheet is located on the opposite side of the scraper blade and the filter plate.

[0013] According to one embodiment of the present invention, concave strips are formed on the filter plate, and the concave strips are opened along the radial direction of the main flow pipe.

[0014] According to one embodiment of the present invention, a reflux pipe is connected to the bottom of the washing tank, the reflux pipe is connected to a water tank, and the other end of the liquid infusion tube is connected to the water tank.

[0015] According to one embodiment of the present invention, a filter box is provided on the return pipe, and the filter box is located between the washing tank and the water tank.

[0016] According to one embodiment of the present invention, the first spray head is a mist spray head.

[0017] The beneficial effect of the present invention is that the first spray head is used to allow the sprayed absorption liquid to have a downward falling stroke, which provides sufficient time for the absorption liquid falling downward to contact with the gas, thereby improving the utilization rate of the absorption liquid. The absorption liquid after contacting with the gas falls on the filter plate, and the gas passing through the filter plate is washed again, thereby improving the utilization rate of the absorption liquid, thereby reducing the loss of the absorption liquid.

[0018] The second spray head is used to spray the filter plate, which ensures the filter plate's demand for absorption liquid and reduces the limit on the spray amount of the first spray head, so that the first spray head can spray a small amount to avoid the absorption liquid sprayed by the first spray head falling too fast.

[0019] Other features and advantages of the present invention will be set forth in the description which follows, and in part will be apparent from the description, or may be learned by practicing the present invention.

[0020] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0022] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0023] Figure 2 It is a schematic diagram of the cross-sectional structure of the washing tank of the present invention;

[0024] Figure 3 It is a schematic diagram of the enlarged structure of the A area of ​​the present invention;

[0025] Figure 4 It is a schematic diagram of the enlarged structure of the B area of ​​the present invention;

[0026] Figure 5 It is a cross-sectional schematic diagram of the connection structure between the main flow pipe and the infusion pipe of the present invention;

[0027] Reference numerals:

[0028] 12. Main flow pipe; 14. Drive unit; 15. Infusion tube; 16. Annular boss; 17. Groove; 18. Guide ring; 19. Sealing ring; 2. Washing tank; 20. Reflux pipe; 21. Water tank; 22. Filter box; 30. Demisting baffle; 31. Scraper; 33. Concave strip; 4. Air inlet; 5. Exhaust port; 6. Filter plate; 8. Spray rack; 91. First spray head; 92. Second spray head. DETAILED DESCRIPTION

[0029] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0030] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0031] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0032] The multi-stage tubular washing tower according to an embodiment of the present invention will be described in detail below with reference to the accompanying drawings.

[0033] like Figure 1-5 As shown, the multi-stage tubular washing tower according to an embodiment of the present invention includes: a washing tank 2 and a spray unit; an air inlet 4 is formed on the side wall of the washing tank 2, and the air inlet 4 is located below the spray unit, and an exhaust port 5 is formed on the top of the washing tank 2; the spray unit includes: a plurality of spray racks 8, a driving unit 14, a demisting baffle 30 and a plurality of filter plates 6; the plurality of spray racks 8 are sequentially arranged inside the washing tank 2 along the flow direction of the gas in the washing tank 2, and a first spray head 91 and a second spray head 92 are arranged on the spray rack 8, the first spray head 91 sprays the absorbent upward, and the second spray head 92 sprays the absorbent downward; the driving unit 14 is connected to the plurality of spray racks 8, and the driving unit 14 is used to drive the spray rack 8 to rotate; the demisting baffle 30 is arranged in the washing tank 2, and the demisting baffle 30 is located above the plurality of spray racks 8; the plurality of filter plates 6 correspond to the plurality of spray racks 8 one by one, and the filter plates 6 are located below the corresponding spray racks 8.

[0034] In this embodiment, the driving unit 14 drives the spray rack 8 to perform a spraying operation during the rotation process, so that the spraying area fully covers the cross section of the washing tank 2, ensuring the coverage rate, so that the gas passing through the washing tank 2 is washed; the multi-stage spraying combined with the rotary spraying ensures the spraying uniformity of the same cross section, thereby improving the contact uniformity between the gas and the absorbent and improving the washing quality; the demisting baffle 30 is at a certain distance from the spray rack 8, and the spray rack 8 is close to its corresponding filter plate 6; because the first spray head 91 sprays upward, the absorption liquid sprayed by the first spray head 91 has a downward falling stroke due to its own gravity, and in this process, a space is provided for the absorption liquid falling downward The absorption liquid is fully in contact with the gas, thereby improving the utilization rate of the absorption liquid. The absorption liquid after contacting the gas falls on the filter plate 6, and the gas passing through the filter plate 6 is washed again, thereby improving the utilization rate of the absorption liquid and reducing the loss of the absorption liquid. The second spray head 92 is used to spray the filter plate 6, which ensures the demand of the filter plate 6 for the absorption liquid and reduces the limit on the spraying amount of the first spray head 91, so that the first spray head 91 can spray a small amount to avoid the absorption liquid sprayed by the first spray head 91 from falling too fast. The demisting baffle 30 blocks the absorption liquid sprayed by the first spray head 91 to avoid it being too close to the exhaust port 5, which causes the suction equipment connected to the exhaust port 5 to suck out of the washing tank 2.

[0035] The spray unit also includes: a main flow pipe 12 and a liquid infusion pipe 15, one end of the liquid infusion pipe 15 is rotatably connected to one end of the main flow pipe 12, the spray frame 8 is fixedly connected to the main flow pipe 12, and the other end of the main flow pipe 12 is fixedly connected to the output end of the driving unit 14.

[0036] A reflux pipe 20 is connected to the bottom of the washing tank 2 , the reflux pipe 20 is connected to a water tank 21 , and the other end of the liquid infusion pipe 15 is connected to the water tank 21 .

[0037] In this embodiment, the infusion pipe 15 uses a pump body to suck the absorption liquid in the water tank 21 into the main flow pipe 12. The main flow pipe 12 guides the absorption liquid to the spray rack 8, and sprays the washing tank 2 through the first spray head 91 and the second spray head 92 on the spray rack 8. The driving unit 14 is a motor, which is fixedly installed in the middle position of the top of the washing tank 2. The output end of the motor is fixedly connected to the main flow pipe 12 to drive the main flow pipe 12 to drive the spray rack 8 to rotate, so that the absorption liquid is evenly distributed, and after being gathered on the filter plate 6, it drips to the bottom of the washing tank 2 and flows to the water tank 21 through the reflux pipe 20.

[0038] Specifically, a connector is formed at one end of the infusion tube 15, and an annular boss 16 is formed on the inner wall of one end of the connector. The inner wall of the annular boss 16 is smoothly connected to the inner wall of the infusion tube 15, and a sealing ring 19 is formed on the annular boss 16. A groove 17 is formed on the inner wall of one end of the connector. A guide ring 18 is formed on the circumferential surface of one end of the main flow tube 12. During installation, one end of the main flow tube 12 is inserted into the sealing ring 19, and the guide ring 18 is embedded in the groove 17, so that the main flow tube 12 is movably connected to the infusion tube 15 to prevent the main flow tube 12 from driving the infusion tube 15 when rotating.

[0039] The spray rack 8 includes a plurality of brackets, which are spaced apart along the circumferential direction of the main flow pipe 12. There are a plurality of first spray heads 91 and a plurality of second spray heads 92, which are evenly distributed on the brackets.

[0040] The bracket extends along the radial direction of the main flow pipe 12 to the inner wall of the washing tank 2 .

[0041] The first spray head 91 is a mist spray head.

[0042] In this embodiment, the spray rack 8 also includes a clamping ring, which is sleeved on the main flow pipe 12 and fixedly connected to the main flow pipe 12. Multiple brackets are fixed on the clamping ring, and the multiple brackets are evenly distributed to increase the stability of the main flow pipe 12. Multiple first spray heads 91 and second spray heads 92 are used to ensure the spray amount of the absorption liquid while further improving the spray atomization degree of the first spray head 91, so that the concentration of the floating absorption liquid in the washing tank 2 is higher, ensuring the sufficient contact between the gas and the absorption liquid.

[0043] Scrapers 31 are provided at both the upper and lower ends of the filter plate 6 , and the scrapers 31 are fixedly connected to the main flow pipe 12 .

[0044] A silicone sheet is provided on the scraper blade 31 , and the silicone sheet is located on the opposite side of the scraper blade 31 and the filter plate 6 .

[0045] In this embodiment, the silicone sheet is in interference contact with the filter plate 6, that is, the silicone sheet and the filter plate 6 have a certain contact area. Therefore, during the rotation of the main flow tube 12, the scraper 31 also rotates therewith to clean the filter plate 6 and avoid clogging the pores on the filter plate 6 due to excessive dust or impurities.

[0046] Concave strips 33 are formed on the filter plate 6 , and the concave strips 33 are opened along the radial direction of the main flow pipe 12 .

[0047] In this embodiment, since the filter plate 6 completely covers the cross-section of the washing tank 2, during the washing process, the impurities cleaned by the scraper 31 cannot be removed in time, and are gathered in the concave strips 33, achieving a gathering effect, reducing the blockage area of ​​the filter plate 6, and extending the service life of the filter plate 6.

[0048] Furthermore, hard material is formed on the edge of the concave strip 33 to scrape off impurities on the silicone sheet when the scraper 31 is moved out of the concave strip 33 .

[0049] A filter box 22 is provided on the return pipe 20 , and the filter box 22 is located between the washing tank 2 and the water tank 21 .

[0050] In this embodiment, the filter box 22 can be a filtering device for filtering impurities, or it can be a regulating device for adjusting the components of the recovered absorption liquid according to demand. That is to say, a component for detecting the components of the absorption liquid is provided in the filter box 22, and by adding components by itself, the absorption liquid enters the water tank 21 and continues the washing cycle.

[0051] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0052] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A multi-stage tubular washing tower, characterized in that: include: A washing tank (2) and a spray unit; an air inlet (4) is formed on the side wall of the washing tank (2), the air inlet (4) is located below the spray unit, and an exhaust port (5) is formed on the top of the washing tank (2); The spray unit comprises: A plurality of spray racks (8), wherein the plurality of spray racks (8) are sequentially arranged inside the washing tank (2) along the flow direction of the gas in the washing tank (2), and a first spray head (91) and a second spray head (92) are arranged on the spray rack (8), wherein the first spray head (91) sprays an absorbent upwards, and the second spray head (92) sprays an absorbent downwards; A driving unit (14), the driving unit (14) being connected to a plurality of spray racks (8), and the driving unit (14) being used to drive the spray racks (8) to rotate; A demisting baffle (30), wherein the demisting baffle (30) is arranged in the washing tank (2), and the demisting baffle (30) is located above a plurality of spray racks (8); A plurality of filter plates (6), wherein the plurality of filter plates (6) correspond one-to-one to a plurality of spray racks (8), and the filter plates (6) are located below the spray racks (8) corresponding thereto.

2. The multi-stage tubular washing tower according to claim 1, characterized in that: The spray unit further comprises: a main flow pipe (12) and a liquid infusion pipe (15), one end of the liquid infusion pipe (15) being rotatably connected to one end of the main flow pipe (12), the spray frame (8) being fixedly connected to the main flow pipe (12), and the other end of the main flow pipe (12) being fixedly connected to an output end of a drive unit (14).

3. The multi-stage tubular washing tower according to claim 2, characterized in that: The spray rack (8) comprises a plurality of brackets, the plurality of brackets being arranged at intervals along the circumferential direction of the main flow pipe (12), the number of the first spray heads (91) and the second spray heads (92) being multiple, and the plurality of the first spray heads (91) and the second spray heads (92) being evenly distributed on the brackets.

4. The multi-stage tubular washing tower according to claim 3, characterized in that: The bracket extends along the radial direction of the main flow pipe (12) to the inner wall of the washing tank (2).

5. The multi-stage tubular washing tower according to claim 4, characterized in that: The filter plate (6) is provided with scrapers (31) at both upper and lower ends, and the scrapers (31) are fixedly connected to the main flow pipe (12).

6. The multi-stage tubular washing tower according to claim 5, characterized in that: The scraper (31) is provided with a silica gel sheet, and the silica gel sheet is located on the opposite surface of the scraper (31) and the filter plate (6).

7. The multi-stage tubular washing tower according to claim 5, characterized in that: The filter plate (6) is formed with concave strips (33), and the concave strips (33) are opened along the radial direction of the main flow pipe (12).

8. The multi-stage tubular washing tower according to claim 2, characterized in that: The bottom of the washing tank (2) is connected to a return pipe (20), the return pipe (20) is connected to a water tank (21), and the other end of the liquid infusion pipe (15) is connected to the water tank (21).

9. The multi-stage tubular washing tower according to claim 8, characterized in that: The return pipe (20) is provided with a filter box (22), and the filter box (22) is located between the washing tank (2) and the water tank (21).

10. The multi-stage tubular washing tower according to claim 1, characterized in that: The first spray head (91) is a mist spray head.

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